Buggy code:
private File patchFile ; private final Map < DistributionContentItem , ContentModification > bundleAdds = new TreeMap < DistributionContentItem , ContentModification > ( ) ; private final Map < DistributionContentItem , ContentModification > bundleUpdates = new TreeMap < DistributionContentItem , ContentModification > ( ) ; private final Map < DistributionContentItem , ContentModification > bundleRemoves = new TreeMap < DistributionContentItem , ContentModification > ( ) ; private final Map < DistributionContentItem , ContentModification > moduleAdds = new TreeMap < DistributionContentItem , ContentModification > ( ) ; private final Map < DistributionContentItem , ContentModification > moduleUpdates = new TreeMap < DistributionContentItem , ContentModification > ( ) ; private final Map < DistributionContentItem , ContentModification > moduleRemoves = new TreeMap < DistributionContentItem , ContentModification > ( ) ; private final Map < DistributionContentItem , ContentModification > miscAdds = new TreeMap < DistributionContentItem , ContentModification > ( ) ; private final Map < DistributionContentItem , ContentModification > miscUpdates = new TreeMap < DistributionContentItem , ContentModification > ( ) ; private final Map < DistributionContentItem , ContentModification > miscRemoves = new TreeMap < DistributionContentItem , ContentModification > ( ) ; private File tmp ; private PatchGenerator ( File patchConfig , File oldRoot , File newRoot , File patchFile ) { } private void process ( ) throws IOException , XMLStreamException { } private PatchConfig parsePatchConfig ( ) throws FileNotFoundException , XMLStreamException { } private File findDefaultNewRoot ( ) { } private static boolean processModIgnored ( File file , DistributionContentItem parent , DistributionStructure structure , boolean [ ] modIgnored ) { } private File findDefaultOldRoot ( PatchConfig patchConfig ) { } private void createTempStructure ( PatchConfig patchConfig ) { } private void analyzeDifferences ( PatchConfig patchConfig ) throws IOException { } private void processNewVersionFile ( File file , DistributionContentItem parent , PatchConfig patchConfig , Set < DistributionContentItem > oldVisited ) throws IOException { } private boolean shouldCompareContents ( File newFile , File oldFile ) { } private void processOldVersionFile ( File file , DistributionContentItem parent , PatchConfig patchConfig , Set < DistributionContentItem > oldVisited ) throws IOException { } private void prepareDifferences ( PatchConfig patchConfig ) throws IOException { } private void recordBundleAdd ( DistributionContentItem itemPath ) throws IOException { } private void recordBundleUpdate ( DistributionContentItem itemPath ) throws IOException { } private void recordBundleRemove ( DistributionContentItem oldItemPath ) throws IOException { } private String getBundleRootName ( DistributionContentItem oldBundleRoot ) { } private void recordModuleAdd ( DistributionContentItem itemPath ) throws IOException { } private void recordModuleUpdateViaContentChange ( DistributionContentItem itemPath ) throws IOException { } private void recordModuleUpdateViaContentRemove ( DistributionContentItem removedPath ) throws IOException { } private void recordModuleRemove ( DistributionContentItem oldModuleRoot ) throws IOException { } private void recordMiscFileAdd ( DistributionContentItem itemPath ) throws IOException { } private void recordMiscFileUpdate ( DistributionContentItem itemPath , PatchConfig config ) throws IOException { } private void recordMiscFileUpdate ( DistributionContentItem itemPath , PatchConfig config , byte [ ] newItemHash , byte [ ] oldItemHash ) throws IOException { } private void recordMiscFileRemove ( DistributionContentItem oldItemPath , PatchConfig config ) throws IOException { } private void recordMiscFileRemove ( DistributionContentItem oldItemPath , PatchConfig config , byte [ ] oldItemHash ) { } private byte [ ] getHash ( DistributionContentItem itemPath , File rootFile ) throws IOException { } private byte [ ] getHash ( File file ) throws IOException { } private static DistributionContentItem getModuleRoot ( DistributionContentItem contentItem ) { } private static DistributionContentItem getBundleRoot ( DistributionContentItem contentItem ) { } private void preparePatchXml ( PatchConfig patchConfig ) throws IOException , XMLStreamException { } private void copyContent ( ) { } private void copyFile ( DistributionContentItem targetItem , File targetBaseDir ) { } private static PatchGenerator parse ( String [ ] args ) { File patchConfig = null ; File oldFile = null ; File newFile = null ; File patchFile = null ; final int argsLength = args . length ; for ( int i = 0 ; i < argsLength ; i ++ ) { final String arg = args [ i ] ; try { if ( ( ( ( "--version" . equals ( arg ) ) || ( "-v" . equals ( arg ) ) ) || ( "-version" . equals ( arg ) ) ) || ( "-V" . equals ( arg ) ) ) { <START_BUG> ProductConfig productConfig = new ProductConfig ( Module . getBootModuleLoader ( ) , SecurityActions . getSystemProperty ( "jboss.home.dir" ) ) ; <END_BUG> System . out . println ( productConfig . getPrettyVersionString ( ) ) ; return null ; } else if ( ( ( "--help" . equals ( arg ) ) || ( "-h" . equals ( arg ) ) ) || ( "-H" . equals ( arg ) ) ) { PatchGenerator . usage ( ) ; return null ; } else if ( arg . startsWith ( "--applies-to-dist=" ) ) { String val = arg . substring ( "--applies-to-dist=" . length ( ) ) ; oldFile = new File ( val ) ; if ( ! ( oldFile . exists ( ) ) ) { System . err . printf ( MESSAGES . fileDoesNotExist ( arg ) ) ; PatchGenerator . usage ( ) ; return null ; } else if ( ! ( oldFile . isDirectory ( ) ) ) { System . err . printf ( MESSAGES . fileIsNotADirectory ( arg ) ) ; PatchGenerator . usage ( ) ; return null ; } } else if ( arg . startsWith ( "--updated-dist=" ) ) { String val = arg . substring ( "--updated-dist=" . length ( ) ) ; newFile = new File ( val ) ; if ( ! ( newFile . exists ( ) ) ) { System . err . printf ( MESSAGES . fileDoesNotExist ( arg ) ) ; PatchGenerator . usage ( ) ; return null ; } else if ( ! ( newFile . isDirectory ( ) ) ) { System . err . printf ( MESSAGES . fileIsNotADirectory ( arg ) ) ; PatchGenerator . usage ( ) ;

Fix:
ProductConfig productConfig = new ProductConfig ( Module . getBootModuleLoader ( ) , SecurityActions . getSystemProperty ( "jboss.home.dir" ) , Collections . emptyMap ( ) ) ;